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MYSOLINE vs ROBAXISAL

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated October 8, 2026·How we rate

Possible drug interaction. MYSOLINE and ROBAXISAL are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Rating

74/100
New

Pharmacy pays

~$2.89 /30
~$0.78 /30

Type

RX
RX

Active ingredient

PRIMIDONE
ASPIRIN AND METHOCARBAMOL

Dosage forms

Tablet
Tablet

Drug class

Anti-Epileptic Agent
—

Boxed warning

None
None

Half-life

—
about 1 to 2 hours

Treats

Partial Epilepsies, Tonic-Clonic Epilepsy, Tremor
—

Frequently asked questions

Which is cheaper, Mysoline or Robaxisal?

Robaxisal costs pharmacies less to acquire — about $0.78 vs $2.89 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Mysoline and Robaxisal?

Mysoline contains Primidone, while Robaxisal contains Aspirin and Methocarbamol — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.